utilization spike

I have been experiencing some issues with my GPU lately. It runs at 0% or 100% and spikes quickly and dramatically. I have already run an antivirus that came up empty, so I don't think I have any viruses. When idling, it spikes between 0% and 80%, and running any game keeps it at 100%. My specs...

CPU: i5-6600k GPU: R9 390 During Call of Duty Modern Warfare I'm seeing my clock speed drop to 300MHz which causes a massive stutter. I using up-to-date drivers (20.3.1) My temps are fine, always around 55C. The stutter is consistent with the clock speed dip. Also my GPU usage spikes from 0-100...